   &  \multicolumn{2}{c}{ log(Price)}   &  \multicolumn{2}{c}{ log(Price)}      \\ 
                    &\multicolumn{1}{c}{Est.}&\multicolumn{1}{c}{S.E.}&\multicolumn{1}{c}{Est.}&\multicolumn{1}{c}{S.E.}\\
 \hline  &&&\\   
log(Output)         &       0.073&       0.004&      -0.383&       0.116\\
 &&&&\\ Method &        \multicolumn{2}{c}{OLS} &       \multicolumn{2}{c}{IV}  \\  First-stage F-statistic && &        \multicolumn{2}{c}{22.7}\\   Observations &   \multicolumn{2}{c}{1913} &        \multicolumn{2}{c}{1913}  \\   \hline    
